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Finding the Fourth Proportional to 626,418.92, 864,458.66 and 339,939

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Solution

The fourth proportional to 626,418.92, 864,458.66 and 339,939 is: 469,116.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,418.92 : 864,458.66 = 339,939 : x
  2. Step 2: Convert to fraction form
    626,418.92/864,458.66 = 339,939/x
  3. Step 3: Cross multiply
    626,418.92x = 864,458.66 × 339,939
  4. Step 4: Simplify right side
    626,418.92x = 293,863,213,271.59
  5. Step 5: Solve for x
    x = 293,863,213,271.59/626,418.92
  6. Step 6: Final answer
    x = 469,116.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.